(19)
(11) EP 1 326 321 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
16.03.2005 Bulletin 2005/11

(43) Date of publication A2:
09.07.2003 Bulletin 2003/28

(21) Application number: 03000059.0

(22) Date of filing: 07.01.2003
(51) International Patent Classification (IPC)7: H02K 11/04, H02K 9/22, H02K 5/14
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT SE SI SK TR
Designated Extension States:
AL LT LV MK RO

(30) Priority: 08.01.2002 JP 2002001287

(71) Applicant: Hitachi, Ltd.
Chiyoda-ku, Tokyo (JP)

(72) Inventors:
  • Yamazaki, Shinji
    Hitachinaka-shi, Ibaraki 312-0063 (JP)
  • Horioka, Wasei
    Hitachinaka-shi, Ibaraki 312-0062 (JP)
  • Takano, Masami
    Hitachinaka-shi, Ibaraki 312-0062 (JP)
  • Tajima, Susumu
    Hitachinaka-shi, Ibaraki 312-0024 (JP)
  • Terumoto, Susumu
    Hitachinaka-shi, Ibaraki 312-0011 (JP)

(74) Representative: Beetz & Partner Patentanwälte 
Steinsdorfstrasse 10
80538 München
80538 München (DE)

   


(54) Alternator for vehicle


(57) The invention relates to an automotive alternator (100) comprising a stator (105) provided with a stator coil (106); a rotor (107) supported for rotation in the stator (105) to apply an alternative magnetic field to the stator (105) ; a regulator (120) for regulating output; a rectifier (124) for rectifying generated current; a plurality of housings (102; 103; 104) holding the stator (105) and the rotor (107); and a coolant path (150) through which a coolant flows through at least one of the plurality of housings (102; 103; 104) to transfer heat generated in the stator coil (106) outside the automotive alternator (100). Fastening devices (136; 137) formed of a material having good heat conductance fasten the regulator (120) and a heatsink (127) for the regulator (120) together to the housing at a position apart from the housing to transfer heat generated by the regulator (120) to the housing. Thus, the automotive alternator (100) can maintain a stable cooling ability in a hot atmosphere for a long time.






Search report